Look at the Hoyt Ruckus Jr. This may be the bow she will learn on at school.
My daughter was the same as yours after the first Hunger Games movie came out. We took a beginners archery class and after she convinced me a new bow wouldn't be "another" toy which would gather dust.
After she convinced me , I took her to Cinnamon Creek Archery in Ft Worth. There she tried many bows, size weight, they measured her draw length, determined the correct pull weight, she decided on the PSE , we had the correct size and weight arrows cut and hit the range. She never looked back.
I guess, my suggestion would be to go to a great archery shop in your area, and have the same thing done I did, yes, you will pay a bit more than Bass Pro or Cabelas but it will be well worth it getting the proper set up for her. BTW I bought a bow too and we shoot together often.
As far as buying a starter bow, look on ARCHERYTALK.COM, you will find a TON of starter bows for sale VERY inexpensive. Lots of great info there too.
Good luck to her and you!!!
"I ain't here for a long time, I'm here for a good time"
King George Strait